Debit and credit transaction with same transaction code with different family and sub-family in ISO2

We are trying to define transaction codes for ISO20022 Bank statements based on the files received from the business, we have identified a scenario where Debit and credit transactions are given with the same transaction code with different family and subfamily.

However, when we try to define the same in the Oracle Fusion, the system does not allow us to use the same transaction codes with different family and sub-family.

How can we define a single transaction code with a different family and subfamily?

Please advise